Bearing and retainer puller



0t.9,14945. c, L MEYER Y 2,385,253f

BEARING AND RETAINER FULLER Filed AJam 8; 1944 INVENTOR v CLA/@sA/cz-L.MEYER Patented Oct. 9, 1945 LJN-Vree STATES PATENroFFlcE assenteVBEARING AND RETAINER PULLER Clarence L. Meyer, Dayton, Ohio ApplicationJanuary 8, 1944, Serial No. 517,516

(Granted under the act of March A3, 1883,`as amended April 30, 1928;v370 0. G. 757) 3 Claims.

The invention described herein may be manufactured and used by or forthe Government for governmental purposes, without the payment to me ofany royalty thereon.

This invention pertains to tools, and more"particularly to tools forpulling hollow sleeve-like or ring-like bearings, races, retainers,bushings, and the like, referred to hereinafter as bearings, from theirsockets, seats, etc,

An object of the invention is to improve the utility and operation ofpullers of the character disclosed in United States Patents Nos.1,650,024 and 1,728,248.

Heretofore, in order to remove a bearing seated in a socket, or otherinaccessible location, upon a. p1anar surface closing the openingthrough the bearing on a plane with that of the end of the bearing, ithas been necessary to engage the inner walls of the bearing, due to theconstruction of conventional pullers, in order to exert extractingyforces for the removal of the bearing. In order to engage the rear endof a bearing with a tool of prior art construction, it is necessary toproject the engaging portions of the to`l beyond the plane of the rearend of the bearing. This, of course, can not be done in instances wherethe bearing seat is not provided with an opening in axial alignment withthe opening through the bearing.

Furthermore, known tools of the character have .extremely limitedapplication, that is, a different sized tool is necessary forpractically every bearing having a diierence in the diameter of theopening therethrough and universal usage is limited by the lack ofinterchangeability of means of expanding the bearing-eneasing neers.

An object of the invention is to Yprovide a puller capable of passingthrough bushings, bearings, etc., of various sized openings and capableof being expanded to engage bearings of such varying sizes forextraction from their seats.

A further object of the invention is to provide a puller which iscapable of wedgingly forcing a bearing from a seat having a flatcontinuous surface across and closing the bearing passageway on a planewith the rear end of the bearing, and further capable of engaging therear end thereof for extraction without engaging or marring the innerwalls of the bearing.

A further object of the invention is to provide means whereby thebearing-engaging fingers of the tool may be expanded from singleprogressive points or over the entire length of the fingers.

A still further object of the invention is to provide means forexpanding the ngers of the tool from points within the extremities ofthe fingers whereby projecting finger-expanding elements are eliminated.

With the foregoing and other objects and` aims inview, my inventionresides in the combination of parts and in the details of constructionhereinafter set lforth in the following lspecification and appendedclaims, certain embodiments which 'have the characteristics of myinvention, and by which the same may be practiced, being` illus-'-trated in the accompanying drawing in'which:

Fig. 1 is a perspective View of the assembledV tool;

Fig. 2, a cross sectional view of an embodiment of the tool for pullinga bearing seated upon a surface closing the end of the bearingpassageway; and

Fig. 3,' a sectionalized View of the end portion of an embodiment of thetool for pulling a bearing from a seat having an opening in axialValignment with that through the bearing.

Generally, the invention includes, as may be seen from the illustratedembodimenty a compression member and tension member, expansiblebearing-engaging means on the tension member and means forsimultaneously exerting compressionel and tensional forces upon thecompression and tension members respectively.

As will be seen from the drawing, Ythe embodiment includes a sleeve 9having inner threads I0, means for rotating the sleeve about its axis,such as 'a cross bar II, an enlarged unthreaded end portion I2 thepassageway I3 of which is of greater diameter than that ofthe passagewayI4 through the threaded sleeve portion, and, as a compression member,laterally extending `means such as a bar, ilange, collar, shoulder orplate I5.

As a tension member, the embodiment includes a collet I6 having a sleeveportion I'I which is l provided withZ inner threads I8 of a samedirectional pitch and diameter as the threads I0 of the sleeve 9. Treouter diameter of the sleeve portion I'I of the collet is such as willslide into l the passageway I3 of the enlarged -unthreaded portion I2 ofthe sleeve lwhich threaded portion forms a shoulder I9 where it joinsthe threaded portion of the sleeve 9. f

In the embodiment illustrated the means for simultaneously exertingcompressional and tensional forces upon the compression and tensionmembers consists of a shaft 20 threaded to cooperate with the threads I0and I8 of the compression sleeve 9 and the tension collet sleeve I'Irespectively. Y

The fingers 22 normally converge sufficiently to bring the= overallcross seotionalarea of the wedges 23 vvith-r in the limits of the crosssectional area 0f the finger-supporting base 2| of the collet -in order'that they may be inserted into any bearing pas-A sageway 25 into whichthe collet lbase 2| will pass. The collet is preferably removablysecured'il to its sleeve-carrying member as by cooperat-V ing threadsindicated at reference character 2 6 in order that it may be exchanged,replaced, or"

removed for the insertion or extraction of replaceable `finger expandingmeans.

VThe means for expanding the collet fingers to force the flat knifelikeends 24 of the bearingengaging wedgesbetween the end of a bearing 2|andits seat 28 consists of a tapered, preferably-conical, end portion 29 ofthe force-exerting shaft 20. This conical end portion is truncated inorder to provide a predetermined expanding force upon inner. surfaces ofthe fingers,"

depending upontheir convergence with respect to the angleof the conicalshaft and, Without protruding beyonduthe plane of the bottom surfaces ofthe wedges.

' In instances Where afbearing seat 28 happens to have an opening orpassageway 30 in axial alignment with the bearing passageway 25, asillustrated in Fig. 3, the conical shaft end may be extendedprotrudingly beyond or through the plane of the wedge surfaces to bringabout greater expansion ofthe fingers for adequate engagement with abearing or for engagement with b'earings having passageways considerablyin excess ofthe cross sectional area of the normally contracted wedges.When the bearing is seated upon va surface closing the end of thebearing passageway; as illustrated in Fig. 2, and when the fingerexpansion required to free and engage the bearing is greater than thatwhich may be accomplished by the conical shaft end when it abuts theseat upon which the Wedges are positioned, supplemental finger expandingmeans 3| are provided. For convenience and satisfactory performance aspherical object, such as a steel ball has been selected for thesupplemental expanding means 3| in the embodiment as illustrated in Fig.2. Supplemental expansion means of varying sizesmay be alternatelyemployed, being limited only by the size of the passageway 32 throughthe collet base portion 2|. In order to obtain axial alignment of thesupplemental expansion means 3| with that of the shaft 20, during theapplication of force, and to prevent the conical end portion of theshaft from Wedging to one side of the supplemental expanding means, theend of the conical portion of the shaft is provided with a concavity 33adapted to partially receive ball 3l and guide it in an advanced pathaxially of the shaft.` Y

In operation, for removing a bearing seated upon a surface having nocontinuing opening beyond the'end of the bearing, as shown in lig. 2,and as distinguished from the bearing seat shown in Fig. 3, the shaft 2uis retracted by holding the collet against rotation and unscrewing theshaft 'by the bar to provide sufficient extension from the plate l5 tothe Wedges to reach the inner end of the bearing. When the Wedges areseated flat upony the surface closing the end of the bearing,

shaft 23 is held against rotation and sleeve 9 is rotated' until theplate |5 is brought into contact with the walls 35 of the bearing well38, wherey, upon sleeve 9 isy held against rotation and shaft`,2|lfrotated to expand the fingers and force the wedges between theinner end of the bearing and its seat. After the Wedges have forcedtheir entrance betweenthe bearing end and its seat, the Shaft isheldagainst rotation and the sleeve 9 then rotated to apply compression uponthe plate i5 simultaneously with the application ofy tension upon thecollet 'I6 vand sleeve I'l to draw the bearing' 4from the Well by theengagement of the wed-ges'.4 l

To remove a bearing from a well having a passageway 30 continuingaxially ofthe passageway 25 through ,the bearing, the Wedges are forcedbetween the .bearing end and its seat and the operation thereafter issimilar to that described in connection .with the removal of the bearingillustratedV in Fig. 2, the distinction being that the supplementalfinger-expanding lmeans 3| is'employed in the Fig. 2 operation since theexpanding conical end `of the shaft cannot protrude beyond the plane ofthe end of the wedges sufficiently to expand the wedges intoengagementwith the inner end of the bearing, Whereas in the operationfor the removal of the bearing illustrated in Fig. 3 th'e supplementalfingerexpanding means need notrbe employed since the conical end portionof the shaft may be projected beyond the plane of the wedges into thepassageway continuingaxially of that of the bearing.

From the foregoing it will be seen that the tool provides means forWedgingly forcing a bearing from a seat on a plane with the end oftheibearing without projecting the tool therebeyond and, of course,without engaging the inner 4walls of the bearing, which would otherwisenormally result in the scoring or marring of the highly polished surfacethereof.

Having described my invention and illustrated an embodiment by which thesame may be practiced what I claim is:

l. In a tool for pulling a bearing ring or the like away from thebottomlof a blind bearing seat Within a socket, said tool comprising asleeve member, alseries of yring-engaging jaws-extending from the end ofsaid sleeve membenjawexpanding means operable within said sleeve memberfor'forcing the jaws radially outward to engage said ring, and tensionmeans carried above the jaws by the jaw-expanding means for pulling thejaws axially from said seat to withdraw saidring, said jaws terminatingin the form of wedges with the foremost sides lying in a planesubstantially normal to 'the axis of the sleeve member, `the othervsides of said Wedges tapering outwardly to sharp edges onha planebeneath the extremitiesof all'other elements of the composite tool,whereby the wedges may be extended into the opening of the ring, heldagainst the bottom of the blind bearing seat, the sharp edges of thewedges then forced between the back end of the ring and the bottom ofthe bearing seat to engage the seated end of the ring, and the engagedring then pulled from the socket by the sleeveline shank which isinternally threaded,.

wherein the means for forcing the jaws radially outward is a shaft, theforward end of which is tapered to suit the taper in the collet, and theremainder is externally threaded to suit the internal threads in thecollet shank, and wherein the means for moving said jaws axially is aninternally threaded sleeve tted to the external threads on said shaft.

3. In a structure as dened in claim 1, wherein the means for forcing thejaws radially outward is a shaft, the forward end of which is providedwith a concavity adapted to serve as a socket or seat to receive aspherical jaw expander to be moved by the shaft along the axis thereof.

CLARENCE L. IVIEYER.

